George harris



G. HARRIS.-

(No Model.)

GALIPERS.

No. 541,749. Patented June '25, 1895 INVENTQH S A m w W A TTOHNE YS.

THE mums PETERS cc. PNOTO-LITHQ, vasnmc'rou, n. c.

UNITED STATES PATENT OFFICE.

' GEORGE HARRIS, OF NEW YORK, N. Y.

CALIPERS.

SPECIFICATION forming part of Letters Patent No. 541,749, dated June 25, 1895.

Application filed March 1, 1895.

To all whom it may concern.-

Be it known that I, GEORGE HARRIS, of New York city, in the county of New York and State of New York, have invented certain new and useful Improvements in Calipers, of which the following is a full, clear, and exact description.

This invention relates to certain improvements in calipers and has for its object to provide a pair of calipers having a micrometer adjustment which shall present certain features of novelty in construction and advantages for use over similar devices heretofore employed, all as will be hereinafter fully set forth.

The novel features of the invention will be carefully defined in the claims.

-Reference is to be had to the accompanying drawings, forming a part of this specification,

in which similar letters. of reference indicatesections b, b and b respectively, and said sections have overlapping perforated ends as seen in the detail view, Fig. 3, which ends are connected together by screws (1, having nuts 0. and washers a, in such a way that the arms may be adjusted so that their sections stand at various angles to one another. The outer sections 17 of the arms B are provided with curved jaws b as clearly seen in Fig. l.

.The body A is composed of any suitable material and is formed of two curved or bowed central parts (1 having sufficient elasticity to permit of being drawn together so as to increase or diminish the distance between the end; portions a of the section A. At the center of the body A the portions a thereof are provided with registering perforations, the perforation in the inner part a being square to receive the squared end 0' of a screw 0 constituting one member of the adjusting device semis. 540,178. (No model.)

a stop to prevent too great movement of the members (7. toward each other, and a spring a is also arranged on the screw 0 between the members a of the body A and serves to hold said members normally away from each other.

In using the device the nut is screwed down on the screw 0 so .as to compress the body A and cause the same to become elongated, as indicated in dotted lines in Fig. 2. Th'ejaws b of the arms B'are then set 0ppo site each other and the sections of said arms arranged at any desired angle, and when thus arranged the arms are slipped over the outer side of the article to be measured and accurately adjusted by loosening the nut a so as to take the dimensions of the article.

The sleeve 0 will act as a stop to prevent the members A of the body from being moved too near each other, and such a stop will be necessary when the body A is composed of wood.

It will be seen that in some cases the sections 5 and b of the arms B may be omitted and the sections 19 may be pivoted directly on the ends of the body A and in other cases the sections b alone may be omitted and the ends of the sections b pivotally connected to the bodyA, so that the length of the arms B may be made greateror less as required; and it will also he observed that in lieu of employing curved sections 19 at the ends of the arms B, said sections-may be formed with points whereby the device is adapted for use as a compass.

Having thus described my invention, I

claim as new and desire to secure by Letters Patent- 1. The combination of a longitudinally exteusible elastic body composed of two members connected together at their opposite ends, arms pivoted at the ends of the body,

and an adjusting device for regulating the movement of said members toward and from each other, substantially as set forth.

2. The combination of a body composed of elastic members connected together at their opposite ends, arms pivoted at the ends of the body, a screw extending through the members and connected at one end to one of said members, and a nut secured on the opposite end of said screw, substantially as set forth.

3. The combination of a body composed of elastic members, arms pivoted to the ends of the body, a screw secured to one of the members and extending through the other member, a sleeve on said screw forming a stop to limit the movement of the members toward and from each other, and a nut secured on the end of said screw, substantially as set forth.

4. The combination of a body composed of two elastic members, arms pivoted to the ends of the body, a screw secured to one member and extending through the other member, a stop for limiting the movement of the members toward and from each other, a spring on said screw between the members, and a nut secured on the outer end of said screw, sub-' stantially as described.

other and adapted, when moved, to return to its original position by its own elasticity said members being connected together at their opposite ends, means for actuating said mov' able member and arms pivoted at the ends of the body and adapted to be moved toward and from each other when the movable member of the body is actuated, substantially as set forth.

6. The combination of a longitudinally extensible body composed of two members connected together at their opposite ends and movable toward and from each other and adapted when moved to return to their original positions by their own elasticity, means for actuating said members, and arms pivoted at the ends of the body and adapted to be moved toward and from each other when the body is extended and contracted, substantially as set forth.

JOHN PENNAY, CASPER A. BAADEN. 

